Serena Williams fuming after first round loss at Miami Open

Serena Williams chucked a bit of a hissy-fit following her straight sets first round loss to Japan’s Naomi Osaka at the Miami Open.

Williams was angry after the loss and reportedly stormed off and refused to give a press conference.

It was the former world number one’s fourth match and second tournament appearance since returning from 13-months maternity leave and she seemed to struggle during rallies and hit plenty of unforced errors in the loss.

(AAP)

Osaka outplayed Williams with more firepower and was quicker across the court, taking victory when Williams sprayed a wide open forehand long.

"I was extremely nervous coming on to the court. I don't know if anybody knows this but Serena is my favourite player," Osaka said.

"So just playing against her is kind of like a dream for me. I'm very grateful I was able to play her and it is even better that I was able to win."

To add insult to injury, it was the 36-year-old’s first loss at a US hardcourt championship in 21 years.